| Abstract from DBPedia | A superbubble or supershell is a cavity which is hundreds of light years across and is populated with hot (106 K) gas atoms, less dense than the surrounding interstellar medium, blown against that medium and carved out by multiple supernovae and stellar winds. The winds, passage and gravity of newly born stars strip superbubbles of any other dust or gas. The Solar System lies near the center of an old superbubble, known as the Local Bubble, whose boundaries can be traced by a sudden rise in dust extinction of exterior stars at distances greater than a few hundred light years.スーパーバブル(Superbubble)とは、複数の超新星や恒星風によって星間空間に吹き寄せられた106Kのガスが詰まった、直径数百光年に及ぶ空洞である。太陽系は、局所泡として知られる古いスーパーバブルの中心付近にあり、その境界は数百光年を超えると塵の減光が急激に大きくなることで識別できる。 (Source: http://dbpedia.org/resource/Superbubble) |
